Pump



June 26, 1928. 1,675,1 15

J. M. LEA

PUMP

- Filed May 2, 1927 Patented June 26, 1928.

, tarsus JOHN M. LEA, F DETROIT, -MICHIGAN.

Pusan.

" Application filed May 2,

i The invention relates to improvements in pumps, as described in the present specification and illustrated in the accompanying drawings that form part of the same.

The invention consists essentially in the novel arrangement and co'nstrution of parts whereby a plurality ofpump units are connected between common headers and elec trically insulated forindividual independent operation in parallel.

The objects of the invention are to provide a pump comprising units which may be readily coupled together to give a desired delivery capacity and at the same time provide a coupling means which will provide proper insulated connections for conducting an operating electric current and also serve as a multiple mounting bracket.

' In the -drawings', Ifigure 1 is a plan view of a three-unit pump and header connections.

Figure2 is a cross-sectional View on the line 2-2 in Figure 1.

Figure 3 is a planview of one unit of a pump showing a modified connection to the headers and supporting bracket.

Like numerals of reference indicate corresponding parts in each figure.

Referring to the drawings, and particularly Figures 1 and 2, the numeral 10 designates apump unit the details of which are not concerned in the present invention, other than the fact that each pump unit has an inlet 11 and outlet 12 controlled by suitable valves and a magnetically operated pumping mechanism (not shown) contained in the lower portion 13 forming the body of the P P- In .the present pump three units-10 are shown connected between a pair of headers 14 and 15 which serve, as hereinafter ex- .plained, to operatively-connect the several units in multiple, and provide an electrically insulated mounting "for the same. s

The headers 14 and 15 are alike and each preferably made from extruded square tubing with a round center bore 16 extending throughout its length, and which may be readily threaded for a short distance at each end to receive standard pipe fittings. The

headers 14 and 15 also have the cross bores 17 extending laterally through the center passage 16 and arranged one opposite the inlet and outlet of each unit 10.

55. The units 10are secured between the pair 192?. Serial N0. 188,112.

of square-shaped headers 14 and 15 by capscrews 18 inserted through the cross-bores 17 in the lieaders from the outer side, and threaded into the correspondingly threaded inlets 11 and outlets 12 of the units 10, suitable Washers 19 of insulating material being provided on each side of the headers to electrically insulate the same from the capscrews and the pump units and to serve as a packing to prevent leakage of liquid while the pump is operating.

Each header cap-screw 18 has a central passage 20 extending from its inner end to a point near its head, and also has the side orifices 200 communicating with the central passage 20 and the passage 16 in the headers,

sot/hat each header cap-screw not only connects the units 10 between the headers, but also completes a liquid passage therebetweem It should also be noted that the header capscrews are reduced where they extend through the headers to leave an ample passage in the headers and to stand insulated therefrom. It is also preferable to have the outside insulating washers 19 on the capscrews 18 extend a little into the cross-bores 17 in the headers to properly line up the entire assembly and definitely insulate the pump unit as described, as it will be understood that'the magnetic circuit of each unit is grounded to the pump body as one terminal connection.

The three units 10 as shown in Figure 1 of the drawings thus forma multiple pump, and a suitable intake connection 21 may be made at one end of the header 14, and a similar outlet connection 22 may be made at one end of the header 15, the other ends of said headers being1 closed by plugs 23.

.Each unit 10 as a separate umpin mechanism as hereinbefore referred to, an one electrical lead 24 is connected to an insulated terminal screw 25 on each unit, from which proper electrical connection is made to the operating solenoid or other mechanisrn, and thence to the. body of the pump unit, and a vsecond electrical lead 26 to the terminal screws 27 threaded into the outer ends of the cap-screws 18 ofa header.

The assembly as above described com letes a three-unit pump with each unit ca'pa le of independent action and a much more regular flow of' liquid through the headers.

It will also be readilyseen that the failure of one unit will in no manner affect the and it may be removed and replaced disturbing the others or their con- '30 and having the pads 31 of insulating material between them and the header.

Referring particularly to Figure 3, a mountin is shown in which only a single electricallead wire 32 is used, and the return current grounded through the pump and its mounting.

The unit 10 is assembled between the headers 14 and 15 just as described with reference to Figures 1 and 2, except that it is not necessaryto insulate the header cap-- screws and only packing or gasket washers are used. Also in this figure a cap-screw 33 is shown with a central passage 34 extending throughout its length and theouter end enlarged toreceive an outlet connection 35. 1

The bracket in this fi ure is shown as a single piece 36 connecte to the ends of the headers 14 and 15 by the plug screw 37 and the bushing 38, to which an intake connection 39 may be made, and of course any number of units may be headed up as desired to complete any required capacity of pump.

Such changes are exemplary of the modifications which may be made in the specific details and arrangement of parts without departing from the spirit of the invention as set forth in the annexed claims.

I claim:

1. A pump comprising a plurality of pumping units each having an inlet and an outlet, a pair of headers each having a central passa of said units and hollow cap screws extending through said cross-bores into the inlet and outlet openings of said units and completing passageways between said headers.

2. A pump comprlsing a pair of fabricated metal headers having opposed flat outside faces and a round center bore threaded at the ends to receive standard pipe fittings and cross bores extending therethrough, a plurality of pump units each having an inlet and an outlet opening and coupling screws extending through said headers and securing the cross bores thereof in communication withthe inlet and outlet openings of said units. I

In testimony whereof I affix my signature.

. JOHN M. LEA.

e with cross-bores opposlte each 

